October 21, 2012 will mark the 81st Anniversary of Thomas Alva Edison's death. To commemorate that date, the National Park Service will host two hours of the late-inventor's house, Glenmont, on October 20th. In addition to the tour of his home, the National Park Service is also going to "include readings of Edison's Last Will and Testament, his death mask created by family friend and sculptor Earle Frasier, and a bronze cast of Edison's hand." When Edison passed away, President Hoover asked the nation to dim its lights in memorial to the inventor of the light bulb.